2001 INFINITI QX4 Factory Service Manual

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Page 433 of 2395

INFINITI QX4 2001 Factory Service Manual SBR665E
CONSULT-II Inspection Procedure=NBBR0097SELF-DIAGNOSIS PROCEDURENBBR0097S011. Turn ignition switch OFF.
2. Connect CONSULT-II to data link connector.
3. Start engine.
4. Drive vehicle over 30

Page 434 of 2395

INFINITI QX4 2001 Factory Service Manual SELF-DIAGNOSTIC RESULTS MODENBBR0097S02
Diagnostic item Diagnostic item is detected when ... Reference Page
FR RH SENSOR*1
[OPEN]ICircuit for front right wheel sensor is open.
(An abnormally high inpu

SELF-DIAGNOSTIC RESULTS MODENBBR0097S02
Diagnostic item Diagnostic item is detected when ... Reference Page
FR RH SENSOR*1
[OPEN]ICircuit for front right wheel sensor is open.
(An abnormally high input voltage is entered.)BR-56
FR LH SENSOR*1
[OPEN]ICircuit for front left wheel sensor is open.
(An abnormally high input voltage is entered.)BR-56
RR RH SENSOR*1
[OPEN]ICircuit for rear right sensor is open.
(An abnormally high input voltage is entered.)BR-56
RR LH SENSOR*1
[OPEN]ICircuit for rear left sensor is open.
(An abnormally high input voltage is entered.)BR-56
FR RH SENSOR*1
[SHORT]ICircuit for front right wheel sensor is shorted.
(An abnormally low input voltage is entered.)BR-56
FR LH SENSOR*1
[SHORT]ICircuit for front left wheel sensor is shorted.
(An abnormally low input voltage is entered.)BR-56
RR RH SENSOR*1
[SHORT]ICircuit for rear right sensor is shorted.
(An abnormally low input voltage is entered.)BR-56
RR LH SENSOR*1
[SHORT]ICircuit for rear left sensor is shorted.
(An abnormally low input voltage is entered.)BR-56
ABS SENSOR*1
[ABNORMAL SIGNAL]ITeeth damage on sensor rotor or improper installation of wheel sensor.
(Abnormal wheel sensor signal is entered.)BR-56
FR RH IN ABS SOL
[OPEN, SHORT]ICircuit for front right inlet solenoid valve is open.
(An abnormally low output voltage is entered.)BR-59
FR LH IN ABS SOL
[OPEN, SHORT]ICircuit for front left inlet solenoid valve is open.
(An abnormally low output voltage is entered.)BR-59
FR RH OUT ABS SOL
[OPEN, SHORT]ICircuit for front right outlet solenoid valve is open.
(An abnormally low output voltage is entered.)BR-59
FR LH OUT ABS SOL
[OPEN, SHORT]ICircuit for front left outlet solenoid valve is open.
(An abnormally low output voltage is entered.)BR-59
RR IN ABS SOL
[OPEN, SHORT]ICircuit for rear inlet solenoid valve is shorted.
(An abnormally high output voltage is entered.)BR-59
RR OUT ABS SOL
[OPEN, SHORT]ICircuit for rear out solenoid valve is shorted.
(An abnormally high output voltage is entered.)BR-59
ABS ACTUATOR RELAY
[ABNORMAL]IActuator solenoid valve relay is ON, even if control unit sends off signal.
IActuator solenoid valve relay is OFF, even if control unit sends on signal.BR-59
ABS MOTOR RELAY
[ABNORMAL]ICircuit for ABS motor relay is open or shorted.
ICircuit for actuator motor is open or shorted.
IActuator motor relay is stuck.BR-61
BATTERY VOLT
[VB-LOW]IPower source voltage supplied to ABS control unit is abnormally low.
BR-63
CONTROL UNITIFunction of calculation in ABS control unit has failed. BR-68
G SENSOR*2
[ABNORMAL]IG sensor circuit is open or shorted.
BR-65
*1: If one or more wheels spin on a rough or slippery road for 40 seconds or more, the ABS warning lamp will illuminate. This does not
indicate a malfunction. Only in the case of the short-circuit (Code Nos. 26, 22, 32 and 36), after repair the ABS warning lamp also illu-
minates when the ignition switch is turned ON. In this case, drive the vehicle at speeds greater than 30 km/h (19 MPH) for approxi-
mately 1 minute as specified in ªSELF-DIAGNOSIS PROCEDUREº, BR-41. Check to ensure that the ABS warning lamp goes out while
the vehicle is being driven.
*2: 4WD models onlyGI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
ST
RS
BT
HA
SC
EL
IDX
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONABS
CONSULT-II Inspection Procedure (Cont'd)
BR-45

Page 435 of 2395

INFINITI QX4 2001 Factory Service Manual PBR455D
DATA MONITOR PROCEDURENBBR0097S031. Turn ignition switch OFF.
2. Connect CONSULT-II to data link connector.
3. Turn ignition switch ON.
4. Touch ªSTARTº on CONSULT-II screen.
SBR670E
5. Touc

Page 436 of 2395

INFINITI QX4 2001 Factory Service Manual PBR455D
ACTIVE TEST PROCEDURE=NBBR0097S04IWhen conducting Active test, vehicle must be stationary.
IWhen ABS warning lamp stays on, never conduct Active test.
1. Turn ignition switch OFF.
2. Connect C

Page 437 of 2395

INFINITI QX4 2001 Factory Service Manual DATA MONITOR MODENBBR0097S05
MONITOR ITEM CONDITION SPECIFICATION
FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSORDrive vehicle.
(Each wheel is rotating.)Wheel speed signal
(Almost the same speed a

DATA MONITOR MODENBBR0097S05
MONITOR ITEM CONDITION SPECIFICATION
FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSORDrive vehicle.
(Each wheel is rotating.)Wheel speed signal
(Almost the same speed as speedometer.)
STOP LAMP SW Brake is depressed.Depress the pedal: ON
Release the pedal: OFF
G-SWITCHHVehicle is driven.
Vehicle is stopped.
Brake is applied.During sudden braking while driving on high roads (asphalt
roads, etc.): OFF
While vehicle is stopped or during constant-speed driving: ON
FR RH IN SOL
FR RH OUT SOL
FR LH IN SOL
FR LH OUT SOL
RR IN SOL
RR OUT SOL1. Drive vehicle at speeds
over 30 km/h (19 MPH) for at
least 1 minute.
2. Engine is running.Operating conditions for each solenoid valve are indicated. ABS
is not operating: OFF
MOTOR RELAYABS is not operating: OFF
ABS is operating: ON
ACTUATOR RELAY
Ignition switch is ON or
engine is running.Ignition switch ON (Engine stops): OFF
Engine running: ON
WARNING LAMPABS warning lamp is turned on: ON
ABS warning lamp is turned off: OFF
BATTERY VOLT Power supply voltage for control unit
ABS OPER SIGABS is not operating: OFF
ABS is operating: ON
H: 4WD model only
ACTIVE TEST MODENBBR0097S06
TEST ITEM CONDITION JUDGEMENT
FR RH SOLENOID
FR LH SOLENOID
RR SOLENOID
Engine is running.Brake fluid pressure control operation
IN SOL OUT SOL
UP (Increase): OFF OFF
KEEP (Hold): ON OFF
DOWN (Decrease): ON ON
ABS MOTORABS actuator motor
ON: Motor runs (ABS motor relay ON)
OFF: Motor stops (ABS motor relay OFF)
ABS OPER SIGIgnition switch is ON or
engine is running.ON: Set ABS OPER SIG ªONº (ABS is operating.)
OFF: Set ABS OPER SIG ªOFFº (ABS is not operating.)
G SWITCHHIgnition switch is ON.G SWITCH (G SENSOR)
ON: Set G SWITCH MONITOR ªONº (G switch circuit is
closed.)
OFF: Set G SWITCH MONITOR ªOFFº (G switch circuit is
open.)
H: 4WD models only
NOTE:
Active test will automatically stop ten seconds after the test starts. (TEST IS STOPPED monitor shows ON.)
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONABS
CONSULT-II Inspection Procedure (Cont'd)
BR-48

Page 438 of 2395

INFINITI QX4 2001 Factory Service Manual SEF233G
SEF234G
How to Perform Trouble Diagnoses for Quick
and Accurate Repair
NBBR0098INTRODUCTIONNBBR0098S01The ABS system has an electronic control unit to control major
functions. The control unit

Page 439 of 2395

INFINITI QX4 2001 Factory Service Manual Preliminary CheckNBBR0099
1 CHECK BRAKE FLUID
Check brake fluid for contamination.
Has brake fluid been contaminated?
Ye s©Replace. GO TO 2.
No©GO TO 2.
2 CHECK BRAKE FLUID LEVEL
Check brake fluid l

Page 440 of 2395

INFINITI QX4 2001 Factory Service Manual 4 CHECK BRAKE BOOSTER OPERATION
Check brake booster for operation and air tightness.
Refer to ªOn-vehicle Serviceº, ªBRAKE BOOSTERº, BR-19.
SBR058C
Is brake booster airtight and functioning proper

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